Some might know him as “the grilled cheese guy,” a face from Food Network, the founder of the Foundry and Maré, or more recently, the opening chef of the infamous Tesla Diner. Eric Greenspan has worn an array of chef hats over the last 30 years but with the opening of his long-planned Mish Delicatessen in the Fairfax District, he hopes to add another: steward of the Jewish deli.“I’m not the first deli to have opened in the past 65 years, but I do think that what we’re trying to do is different,” Greenspan said. “I don’t take the responsibility...